let num1:number = 5;
console.log(num1);

let canvas1 = document.querySelector('canvas');
let ctx =  canvas1.getContext('2d');
canvas1.width = screen.availWidth;
canvas1.height = screen.availHeight;
let str1:string = '我好帅啊啊啊啊'
let arr = new Array(Math.ceil(canvas1.width/10)).fill(0)
